Filters: Tags: Herbicides (X) > Date Range: {"choice":"year"} (X)
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Hybrid sunflower production occurs near Sacramento in Northern California where seed treatments are commonly used. In this study, four locations were sampled in 2016 as matched pairs; half of each field was sown with thiamethoxam treated seed and half without. In addition to the thiamethoxam seed treatment, all seeds were coated with two fungicides, fludioxonil and mefenoxam/metalaxyl. Both wild bee and honey bee pesticide exposure was assessed by analyzing field soil, sunflower pollen and nectar, honey bees (pollen and nectar foraging) and a sunflower specialist wild bee, Melissodes agilis. Samples were extracted via pressurized liquid extraction (except nectar which underwent a room temperature solvent extraction)...
Categories: Data;
Tags: California,
Environmental Health,
USGS Science Data Catalog (SDC),
environment,
fungicides,
These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set contains annual county-level estimates of total atrazine use on 16 agricultural crops and four agricultural land uses between 1992 and 2007. For each year, atrazine use was estimated for all counties in the conterminous U.S. (except California) by combining (1) proprietary data from the DMRKynetec (DMRK) AgroTrak database on the mass of atrazine applied annually to agricultural crops, (2) county harvested crop acreage,...
Herbicide treatments were applied to Zerene silverspot (Speyeria = Argynnis zerene zerene) post-diapause larvae and early blue violets (Viola adunca), the larval host plant of the Zerene silverspot butterfly, in two greenhouse experiments in 2018-2019. Treatments included distilled water for untreated (U), Agri-Dex (A), Nu Film IR (N), clopyralid (C), clopyralid with Agri-Dex (CA), clopyralid with Nu Film IR (CN), fluazifop-p-butyl (F), fluazifop-p-butyl with Agri-Dex (FA), and fluazifop-p-butyl with Nu Film IR (FN). Zerene silverspot responses measured in the 2018 experiment included larval and pupal survival, sex ratio, larval and pupal development time, pupal and adult mass, adult morphology, female fecundity,...
Categories: Data;
Tags: Butterfly conservation,
Clopyralid,
Ecology,
Fluazifop-p-butyl,
Habitat restoration,
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